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Decode ZL1 engine

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Old Jan 23, 2011 | 01:17 PM
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Default Decode ZL1 engine
Hello

I need help to decode a ZL1 block.
It has casting 46053Y...........NOT 3946053
This block was bought in 1988.

What can it be?

Thanks
Kristoffer
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Old Jan 23, 2011 | 01:49 PM
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Probably the Yenko copy of the GM block. Nice find.
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Old Jan 23, 2011 | 03:05 PM
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Originally Posted by 70rs/ss396
Hello

I need help to decode a ZL1 block.
It has casting 46053Y...........NOT 3946053
This block was bought in 1988.

What can it be?

Thanks
Kristoffer
I had one a couple of years ago, same casting number, had the YENKO crest and YENKO name cast in the front, directly above the timing cover. RARE engine.
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